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What is the function of nitrifying bacteria?
Nitrifying bacteria converts ammonia compounds into nitrites and nitrates while denitrifying converts the nitrates into atmospheric nitrogen gas. It is confusing as at first I thought that the denitrifying bacteria would convert the nitrates into ammonia, but that is wrong. Denitrification is the opposite to nitrogen fixation, not nitrification.
Where was the oldest skeleton found?
Scientists recently announced the discovery of the oldest fossil skeleton of a human ancestor. The find reveals that our forebears underwent a previously unknown stage of evolution more than a million years before Lucy, the iconic early human ancestor specimen that walked the Earth 3.2 million years ago.The centerpiece of a treasure trove of new fossils, the skeleton---assigned to a species called Ardipithecus ramidus---belonged to a small-brained, 110-pound (50-kilogram) female nicknamed "Ardi."
Why do dogs eat there stool?
Dogs naturally eat their poop and other dogs poop for nutrition, so a domestic dog shouldn't need to, but the instinct may still be there or your dog may be eating too fast, making them think they are not full and need more food, if you spread out a dogs food through the day or feed it in servings so it is forced to slow its eating down it may stop eating poop, if it is a learned behavior you will have to train the dog not to do it, but that's why they do.
